RT Journal Article SR Electronic T1 Risk of duodenal cancer in patients with familial adenomatous polyposis JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1547 OP 1547 VO 53 IS 10 A1 G Biasco A1 M A Pantaleo A1 G Di Febo A1 C Calabrese A1 G Brandi YR 2004 UL http://gut.bmj.com/content/53/10/1547.1.abstract AB